function F = price_decline(sal_pnt)

%
% This program returns the price decline, given the 
% associated sales cdf.
%
% Parameters estimated in prc_func_est.m
%

global beta_est

ll = length(sal_pnt);

x = [ones(ll,1) sal_pnt sal_pnt.^2 sal_pnt.^3];

F = x*beta_est;
